Mapping of quantitative trait loci controlling partial resistance against rust incited by <Emphasis Type="Italic">Uromyces pisi</Emphasis> (Pers.) Wint. in a <Emphasis Type="Italic">Pisum fulvum</Emphasis> L. intraspecific cross |
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| Authors: | E Barilli Z Satovic D Rubiales A M Torres |
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| Institution: | 1.Key Laboratory for Genetics and Breeding of Forest Trees and Ornamental Plants, Ministry of Education,Beijing Forestry University,Beijing,People’s Republic of China;2.Institute of Vegetables and Flowers,Chinese Academy of Agricultural Sciences,Beijing,People’s Republic of China |
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| Abstract: | A quantitative trait loci (QTL) associated with resistance to pea rust, caused by the fungus Uromyces pisi (Pers.) Wint., has been identified in a F2 population derived from an intraspecific cross between two wild pea (Pisum fulvum L.) accessions, IFPI3260 (resistant) and IFPI3251 (susceptible). Both parental lines and all the segregating population displayed
a fully compatible interaction (high infection type), which indicates absence of hypersensitive response. Nevertheless, differences
on the percentage of symptomatic area of the whole plant (disease severity) were observed. A genetic map was developed covering
1283.3 cM and including 146 markers (144 random amplified polymorphic DNA (RAPDs) and two sequence tagged sites (STSs) markers)
distributed in 9 linkage groups. A QTL explaining 63% of the total phenotypic variation was located in linkage group 3. RAPDs
markers (OPY111316 and OPV171078) flanking this QTL should allow, after their conversion in SCARs, a reliable marker-assisted selection for rust resistance. |
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